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MAX1830-MAX1831

更新时间： 2024-10-02 22:34:51
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美信 - MAXIM 稳压器开关
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13页 278K
描述
3A, 1MHz, Low-Voltage, Step-Down Regulators with Synchronous Rectification and Internal Switches

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MAX1830-MAX1831 数据手册

 浏览型号MAX1830-MAX1831的Datasheet PDF文件第2页浏览型号MAX1830-MAX1831的Datasheet PDF文件第3页浏览型号MAX1830-MAX1831的Datasheet PDF文件第4页浏览型号MAX1830-MAX1831的Datasheet PDF文件第5页浏览型号MAX1830-MAX1831的Datasheet PDF文件第6页浏览型号MAX1830-MAX1831的Datasheet PDF文件第7页 
19-2198; Rev 0; 10/01  
3A, 1MHz, Low-Voltage, Step-Down Regulators with  
Synchronous Rectification and Internal Switches  
General Description  
Features  
The MAX1830/MAX1831 constant-off-time, pulse-width-  
modulated (PWM) step-down DC-DC converters are  
ideal for use in 5V and 3.3V to low-voltage conversion  
necessary in notebook and subnotebook computers.  
These devices feature internal synchronous rectification  
for high efficiency and reduced component count. They  
require no external Schottky diode. The internal 45mΩ  
PMOS power switch and 55mΩ NMOS synchronous-rec-  
tifier switch easily deliver continuous load currents up to  
3A. The MAX1830 produces preset +2.5V, +1.8V, or  
+1.5V output voltage or an adjustable output from +1.1V  
o
1ꢀ.5% OutOu%ꢁAAOꢂrAc  
o 945%EffiAienAc  
o Inueꢂnrl%PM S/NM S%SwiuAhes  
4.mΩ/..mΩ  n-ResisurnAe%ru%V =%+4ꢀ.V%  
.0mΩ/..mΩ  n-ResisurnAe%ru%V =%+3V  
IN  
IN  
o  OutOu%Volurges  
+3ꢀ3V,%+2ꢀ.V,%oꢂ%+1ꢀ.V%Pin%SeleAurble%(MꢁX1831)  
+2ꢀ.V,%+1ꢀ8V,%oꢂ%+1ꢀ.V%Pin%SeleAurble%(MꢁX1830)  
+1ꢀ1V%uo%V ꢁdjOsurble%(Bouh%DeviAes)  
IN  
to V . The MAX1831 produces preset +3.3V, +2.5V, and  
IN  
o +3V%uo%+.ꢀ.V%IntOu%Volurge%Rrnge  
o 7.0µꢁ%(mrx)% teꢂruing%SOttlc%COꢂꢂenu  
o <1µꢁ%ShOudown%SOttlc%COꢂꢂenu  
+1.5V output voltages and an adjustable output from  
+1.1V to V They achieve efficiencies as high as 94%.  
IN.  
The MAX1830/MAX1831 use a unique current-mode,  
constant-off-time, PWM control scheme, which includes  
Idle Mode™ to maintain high efficiency during light-  
load operation. The programmable constant-off-time  
architecture sets switching frequencies up to 1MHz,  
allowing the user to optimize performance trade-  
offs between efficiency, output switching noise, compo-  
nent size, and cost. Both devices are designed for con-  
tinuous output currents up to 3A, an internal digital  
soft-start to limit surge currents during startup, a 100%  
duty cycle mode for low-dropout operation, and a  
low-power shutdown mode that disconnects the input  
from the output and reduces supply current below  
1µA.The MAX1830/MAX1831 are available in 16-pin  
QSOP packages.  
o Pꢂogꢂrmmrble%Consurnu- ff-Time% teꢂruion  
o Ut%uo%1MHz%SwiuAhing%FꢂeqOenAc  
o Idle%Mode% teꢂruion%ru%Lighu%Lords  
o Theꢂmrl%ShOudown%  
o Inueꢂnrl%Digiurl%Sofu-Surꢂu%InꢂOsh%COꢂꢂenu%Limiuing  
o 1005%DOuc%CcAle%DOꢂing%Low-DꢂotoOu% teꢂruion  
o  OutOu%Shoꢂu-CiꢂAOiu%PꢂoueAuion  
o 16-Pin%QS P%PrAkrge  
Ordering Information  
For similar devices that provide continuous output  
currents of 1A to 3A, refer to the MAX1644, MAX1623,  
and MAX1742/MAX1842/MAX1843 data sheets.  
PꢁRT  
TEMPꢀ%RꢁNGE  
-40°C to +85°C  
-40°C to +85°C  
PIN-PꢁCKꢁGE  
MꢁX1830EEE  
MꢁX1831EEE  
16 QSOP  
16 QSOP  
Applications  
5V or 3.3V to Low-Voltage Conversion  
CPU I/O Supplies  
Typical Configuration  
Chipset Supplies  
OUTPUT  
+1.1V TO  
IN  
INPUT  
+3V TO  
+5.5V  
Notebook and Subnotebook Computers  
IN  
LX  
FB  
V
MAX1830  
MAX1831  
V
PGND  
CC  
GND  
SHDN  
COMP  
TOFF  
FBSEL  
REF  
Pin Configuration appears at end of data sheet.  
Idle Mode is a trademark of Maxim Integrated Products, Inc.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
1234567...13

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